ULPowerEngines I

Formed in 2006, ULPOWER Aero Engines is a small Belgian company which started as a joint venture by a number of individuals and companies. Their intention is to develop and manufacture a light weight aero engine where power and reliability is priority number one.

ULPower engines have been developed specifically for use in light aircraft and are manufactured to the highest standards with fully electronic ignition and multi-point fuel injection (FADEC) system as standard equipment.

Their truly modern engines feature dual electronic ignition (with variable timing), excellent power-to-weight ratio, and high fuel efficiency in a conventional configuration: air-cooled, direct drive, horizontally opposed 4 or 6-cylinder (boxer). Full aerobatic and helicopter configurations are also available from them.

On these pages we are going to describe the different engine model ULPower sells and start off with the smaller versions.

Four Cylinder Engines

There are, at this moment, eight different versions of the UL260 and UL350 engine range. In the table below we summarize the most important aspects and specifications compared between each of these models:

Engine Model

UL260i

UL260iS / UL260iSA

Displacement

2592 cm3 [158.17 in3]

Bore

105,6 mm [4.157 in]

Stroke

74 mm [2.913 in]

Compression Ratio

8.16 : 1

9.10 : 1

Firing Order

1-3-2-4

Direction of Rotation

Clockwise - cockpit view

Max Torque (ISA)

218 Nm [160.8 ft.lbf] @ 2700 RPM

240 Nm [177 ft.lb] @ 2800 RPM

Power Rating (ISA)

97 hp @ 3300 RPM82 hp @ 2800 RPM

107 hp @ 3300 RPM93 hp @ 2800 RPM

Installed Weight

72,3 kg [159.3 lbs]

DC Output

30 A (+/- 15 A - user)

Oil Capacity

2,5 l [0.66 US gal]

Min. Fuel

95/98 Octane (AVgas 100LL)

98 Octane (AVgas 100LL)

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Note: the UL260iSA is the same as the UL260iS but with an adapted oil system to allow inverted flight. The UL260iF is limited to 100 hp @ 3000 rpm.

Engine Model

UL350i

UL350iS / UL350iSA

Displacement

3503 cm3 [213.77 in3]

Bore

105,6 mm [4.157 in]

Stroke

100 mm [3.937 in]

Compression Ratio

8 : 1

8.7 : 1

Firing Order

1-3-2-4

Direction of Rotation

Clockwise - cockpit view

Max Torque (ISA)

305 Nm [225 ft.lbf] @ 2400 RPM

320 Nm [236 ft.lb] @ 2400 RPM

Power Rating (ISA)

120 hp @ 3300 RPM116 hp @ 2800 RPM

130 hp @ 3300 RPM123 hp @ 2800 RPM

Installed Weight

78,4 kg [172.8 lbs]

DC output

30 A (+/- 15 A - user)

Oil capacity

2,5 l [0.66 US gal]

Min. Fuel

95/98 Octane (AVgas 100LL)

98 Octane (AVgas 100LL)

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Note: the UL350iSA is the same as the UL350iS but with an adapted oil system to allow inverted flight. The UL350iHPS is designed for helicopter and gyrocopter applications and delivers 145 hp @ 3500 RPM (131 hp @ 3000 RPM).